Mechanical and Rheological Properties of High Density Polyethylene Reinforced Polyvinyl Alcohol Fiber Composites

2019 ◽  
Vol 805 ◽  
pp. 88-93
Author(s):  
Achmad Chafidz ◽  
R.M. Faisal ◽  
Dewi Selvia Fardhyanti ◽  
Indar Kustiningsih ◽  
Jono Suhartono
Keyword(s):  
Polyvinyl Alcohol ◽  
Water Absorption ◽  
Rheological Properties ◽  
High Density Polyethylene ◽  
Flexural Modulus ◽  
Complex Viscosity ◽  
Fiber Composites ◽  
High Density ◽  
Polyvinyl Alcohol Fiber ◽  
Pva Fiber

In the current study, high density polyethylene filled polyvinyl alcohol fiber composites have been made via melt compounding process using a twin screw extruder. Four different fiber loadings (0, 5, 10, 20 wt%) together with HDPE matrix were mixed and melt blended with the extruder. The prepared composites were tested for their melt rheological properties, mechanical properties, FT-IR spectra, and water absorption behavior. Rheological test results exhibited that complex viscosity of the composites were higher than the neat HDPE and increased with the increase of PVA loadings. Moreover, the improvement of complex viscosity was more prominent at higher PVA loadings (i.e. PVAC-10 and PVAC-20) than at the lower one (PVAC-5). The flexural modulus and strength were higher for the all composites samples when compared to the neat HDPE, indicating that the incorporation of PVA fiber has successfully improved the mechanical (i.e. flexural) properties of the HDPE/PVA fiber composites. The FTIR analysis results prevailed the appearance of C=O spectrum at 2361 cm-1 that corresponding to carbonyl bond of PVA fiber on the whole composites. Additionally, from the water uptake test, the degree of water absorption of the composites increased with the fiber loadings.

Enhancing Mechanical Properties of Polyvinyl Alcohol Fiber Reinforced High Density Polyethylene Composites

2018 ◽  
Vol 777 ◽  
pp. 27-31
Author(s):  
Achmad Chafidz ◽  
Ariany Zulkania ◽  
Tintin Mutiara ◽  
Prima A. Handayani ◽  
Muhammad Rizal
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Alcohol ◽  
Tensile Test ◽  
High Density Polyethylene ◽  
High Density ◽  
Sem Images ◽  
Melt Compounding ◽  
Twin Screw ◽  
Pva Fiber ◽  
Surface Morphologies

In this work, high density polyethylene (HDPE)/polyvinyl alcohol (PVA) fiber composites have been fabricated via melt compounding by employing a twin-screw extruder. The resulted composites samples of four different PVA loadings (i.e. 0, 5, 10, 20 wt%) were then characterized via tensile test to investigate the effect of PVA loadings on their mechanical properties (i.e. modulus elasticity, tensile strength, toughness, and strain at break). Additionally, the surface morphologies of the composites (i.e. cryo-fractured and tensile fractured samples) were also studied by using a scanning electron microscopy (SEM). The SEM micrographs on the cryo-fractured sample showed that PVA fibers were perfectly embedded and well blended in HDPE matrix. Whereas, the SEM images of tensile-fractured samples showed that there was a fibrillation effect on the neat HDPE, while in the composites sample, there was an evident of broken fibers. Additionally, from the tensile test results, the modulus elasticity of the composites has increased by approximately 16, 39, and 81% (as compared to the neat HDPE) for PVAC-5, PVAC-10, and PVAC-20, respectively. Whereas, the toughness and strain at break of the composites have decreased.

Thermal Properties of High Density Polyethylene/Poly(Vinyl Alcohol) Fiber Composites Prepared Using Laboratory Mixing Extruder

2021 ◽  
Vol 315 ◽  
pp. 114-119
Author(s):  
Achmad Chafidz M.S. ◽  
Dewi Selvia Fardhyanti ◽  
Megawati ◽  
Prima Astuti Handayani ◽  
Muhammad Rizal
Keyword(s):  
Thermal Properties ◽  
Vinyl Alcohol ◽  
High Density Polyethylene ◽  
Crystallinity Index ◽  
Fiber Composites ◽  
High Density ◽  
Poly Vinyl Alcohol ◽  
Scanning Calorimetry ◽  
Pva Fiber ◽  
Melting And Crystallization

This paper focuses on the preparation of High Density Polyethylene/Poly (Vinyl Alcohol) Fiber composites which was fabricated via melt blending/compounding method using a Laboratory Mixing Extruder (LME). The effect of PVA fiber concentrations (i.e. 0, 5, 10, 20, 30 wt%) on the thermal properties (i.e. melting and crystallization) of the composites was investigated. The thermal properties of the composites were analysed using a Differential Scanning Calorimetry (DSC). The DSC analysis results exhibited that the presence of PVA fiber did not considerably change the melting and crystallization properties of the composites. The melting temperature (Tm) of all the composites samples were similar, which was in the range of 130 - 131 °C. The highest Tm was belong to sample PVAC-20 (i.e. 20 wt% PVA fiber). In the other hand, the crystallinity index (Xc) of the HPDE/PVA fiber composites decreased with the increase of PVA fiber concentrations. The Xc of the composites decreased from 56.7 % for PVAC-0 to 49.8 % for PVAC-20. Additionally, in term of crystallization behavior of the composites, the effect of PVA loadings on the crystallization temperature (Tc) of the composites was also not significant. The Tc of all composites samples were similar, which was about 115 °C. It can be suggested that the addition of PVA fiber did not affect the crystallization process of the matrix.

Comparative study of flexural and physical properties of graphite-filled immiscible polypropylene/epoxy and high-density polyethylene/epoxy blends

2021 ◽  
pp. 096739112110470
Author(s):  
Oluwaseun Ayotunde Alo ◽  
Iyiola Olatunji Otunniyi
Keyword(s):  
Water Absorption ◽  
High Density Polyethylene ◽  
Interfacial Adhesion ◽  
Flexural Modulus ◽  
High Density ◽  
Flexural Properties ◽  
Melt Mixing ◽  
Synthetic Graphite ◽  
Epoxy Blends ◽  
Scanning Electron

Polypropylene/epoxy/synthetic graphite (PP/EP/SG) and high-density polyethylene (HDPE/EP/SG) composites were prepared by melt mixing followed by compression molding. The immiscibility of the polyolefins with epoxy was confirmed by thermogravimetric analysis. Scanning electron microscopy (SEM) studies showed that HDPE/EP blend exhibits inferior interfacial adhesion between the component polymers compared to PP/EP blend. Also, the effect of SG content on flexural properties, density, moldability, water absorption, and porosity of the PP/EP/SG and HDPE/EP/SG composites was investigated. For both PP/EP/SG and HDPE/EP/SG composites, flexural modulus, density, and porosity increased with increase in SG content. For PP/EP/SG composites, the water absorption decreased from 0.154% at 30 wt% SG to 0.072% at 70 wt% SG. Further increase in SG content to 80 wt% caused an increase in water absorption. On the other hand, water absorption for HDPE/EP/SG increased with SG content all through. At the same filler loadings, PP/EP/SG composites showed lower density and porosity and performed better in terms of flexural modulus and water absorption compared to HDPE/EP/SG composites.

Effect of fiber modified by alkali/polyvinyl alcohol coating treatment on properties of sisal fiber plastic composites

2020 ◽  
Vol 39 (23-24) ◽  
pp. 880-889
Author(s):  
Can Hu ◽  
Yueyun Zhou ◽  
Ting Zhang ◽  
Taijun Jiang ◽  
Guangsheng Zeng
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Alcohol ◽  
Water Absorption ◽  
High Density Polyethylene ◽  
Interfacial Adhesion ◽  
Natural Fibers ◽  
High Density ◽  
Sisal Fiber ◽  
Reinforced Composites ◽  
Plastic Composites

Demand for natural fibers reinforced composites is growing as an alternative to synthetic fiber reinforced plastic composites. However, poor compatibility between natural fiber and matrix has limited its development. Therefore, it is necessary to improve their interfacial adhesion to improve the comprehensive properties of composites. In this work, sisal fibers were subjected to an alkali/polyvinyl alcohol coating treatment by an ultrasonic impregnation method, and the sisal/high-density polyethylene composite was prepared by a twin-screw extruder. The Fourier transform infrared spectroscopy was used to characterize the modification effect of sisal fiber. The surface morphology of sisal fiber and the interfacial morphology of sisal/high-density polyethylene composites were observed. The mechanical properties and water absorption of sisal/ high-density polyethylene composites were also studied. The results show that alkali/polyvinyl alcohol coating compound treatment can effectively improve the interfacial adhesion between sisal fiber and high-density polyethylene, improve the mechanical properties of composite, and reduce water absorption. Alkali/polyvinyl alcohol coating compound treatment is a very environment-friendly, cost-effective fiber modification method when compared with traditional modification methods. It is helpful for the development and application of natural fibers reinforced composites.

Development of hemp fiber composites with recycled high density polyethylene grocery bags

2021 ◽  
Author(s):  
Carlos Angulo ◽  
Siddhartha Brahma ◽  
Alejandra Espinosa‐Dzib ◽  
Robert Peters ◽  
Katherine M. E. Stewart ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Fiber Composites ◽  
High Density ◽  
Hemp Fiber

scholarly journals In-Situ Synthesis and Property Evaluation of High-Density Polyethylene Reinforced Groundnut Shell Particulate Composite

2021 ◽  
Vol 6 (4) ◽  
pp. 305-311
Author(s):  
Abdulmumin Adebisi ◽  
Tajudeen Mojisola ◽  
Umar Shehu ◽  
Muhammed Sani Adam ◽  
Yusuf Abdulaziz
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Impact Energy ◽  
High Density Polyethylene ◽  
In Situ Synthesis ◽  
High Density ◽  
Compression Moulding ◽  
Melt Mixing ◽  
Groundnut Shell

In-situ synthesis of high-density polyethylene (HDPE) reinforced groundnut shell particulate (GSP) composite with treated GSP within the range of 10-30 wt% at 10 wt% has been achieved. The adopted technique used in the production of the composite is melt mixing and compounding using two roll mills with a compression moulding machine. Properties such as hardness, tensile strength, impact energy and water absorption analysis were examined. The result revealed that addition of GSP increases the hardness value from 22.3 to 87 Hv. However, the tensile strength progressively decreased as the GSP increases in the HDPE. This trend arises due to the interaction between neighbouring reinforced particulate which appears to influence the matrix flow, thereby inducing embrittlement of the polymer matrix. It was also observed that water absorption rate steadily increased with an increase in the exposure time and the absorbed amount of water increases by increasing the wt% of the GSP. Analysing the obtained results, it was concluded that there were improvements in the hardness, tensile strength, impact energy and water absorption properties of the HDPE-GSP polymer composite when compared to unreinforced HDPE. On these premises, GSP was found as a promising reinforcement which can positively influence the HDPE properties of modern composites.

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